Dental equipment stand



May 19, 1953 Filed Jan. 6, 1951 R. S. WYN E DENTAL EQUIPMENT STAND '2 Sheets-Sheet l Patented May 19, 1953 UNITED STATES PATENT OFFICE DENTAL EQUIPMENT STAND Robert S. Wyne, Kansas City, Mo.

Application January 6, 1951, Serial No. 204,708 7 claims. (ci. 32-22) This invention relates to dental apparatus and more particularly to a high volume water takeoff and blood ejector or sy-phon pump attachment operated thereby for use on conventional dental unit pedestals having fountain cuspidors and water supply and discharge connections.

Conventional dental units having a cuspidor on an apparatus pedestal, a water supply unit enclosed in the pedestal, a saliva ejector and Various valve controlled flow lines or passages for desired operation of the unit. A saliva ejector is usually sufficient for normal or general dental requirementsJ but when dental surgery is necessary other equipment must be moved in or the :patient taken to other rooms having surgical equipment because thelconventional dental unit and particularly the saliva ejector is not capable of handling the quantity of blood resulting from surgery.

The objects of the present invention are to provide apparatus which is an accessory or improvement for dental units to adapt same for the handling of blood from dental surgery Without detracting from the normal operation of the unit and conventional apparatus thereon; to provide a high volume water takeoff for dental units; to provide a blood ejector operated by the high volume water takeo; to provide a blood ejector assembly and discharge therefor removably mounted inthe conventional cuspidor without alteration of the conventional apparatus and operation of the dental unit; and to provide a simple,leflicient attachment to conventional dental units for handling blood resulting from dental surgery that is economical to manufacture and easily applied to the dental units.

In accomplishing these and other objects of the `present invention, I have provided improved details of structure, the preferred forms of which are illustrated in the accompanying drawings, wherein:

Fig. 1 is an elevational view of the high volume water takeoff and blood ejector mounted on a conventional dental unit.

Fig. 2 is a vertical sectional view through a portion of Athe dental unit with the highvolume water takeoi attached thereto. l

Fig. 3 is a disassembled perspective view of the parts of the high volume water takeoff.

Fig. 4 is a transverse sectional view through the high volume water takeofl` on the line 44, Fig. 2.

Fig. 5 is a vertical sectional view through the blood ejector.

Fig. 6 is a sectional view throughV a modified form of high volume water takeoff attached to a dental unit pedestal. l

Referring more in detail to the drawings:

I designates a dental unit including a support 2 in the form of a dental stand or pedestal and having a laterally projecting portion 3 on which is secured a mounting or bearing 4 designed to rotatably receive and support a tubular member in the form of an arm 5 having thereon a cuspidor bowl or basin 6 communicating therewith, Supported on the inner end of the tubular member is a hollow, upstanding arm 1, the upper end of which is enlarged to form a` head il enclosing suitable valves (not shown) controlling flow of water to a nozzle tube 9 of a tumbler holder ill carried on a reduced extension I l of the upstanding arm l, the valves and the head also controlling flow of water through a saliva electing means housed within the head and from which extends a iieXible conduit I2 carrying the usual or any suitable terminal (not shown) for insertion with-- in the patients mouth for withdrawing the saliva.

A liquid supply conduit I3 leading to the valve head 8 has an inlet end connected with a coupling I 4 which in turn is detachably connectedI by a nut I5 with a reduced extension I6 on the lower end of the bearing 4. The extension is provided with an outlet passage I'I communicating with a valve chamber I8 having an inlet passage i9 adapted to be controlled by a master valve 2i) disposed within said chamber. Leading to the inlet passage I9 is a supply pipe or connection 2i disposed within the hollow pedestal and adapted to receive a supply from a suitable source (not shown). The valve 20 serves to control the water supply for the cuspidor and glass holder and is intended to be closed when the apparatus is not l in use.

The liquid supplied to the cuspidor is adapted to discharge therefrom into the tubular arm 5 from whence it passes through the reduced outlet portion 22 of the arm to the passage 23 of the bearing 4 and into a pipe 24 connected with said passage and extending within the pedestal and adapted to convey the liquid thereroin to a suitable discharge pipe (not shown). The above described structure is conventional and usually includes a master valve bonnet mounted on the bearing 4 supporting a Valve stern and external master valve operating member for controlling iow of liquid from the inlet passage I9, said liquid normally flowing only to the outlet passage l1 and conduits connected therewith.

The master valve having a high volume water take-oil and forming part of the invention includes a body member 25, cylindrical in crosssection, having an externally threaded end 26 screwed into a threaded bore 2l forming part of valve 29 being in open position, operation of the valves operating member 69 to open the valve 59 allows water to flow from the valve chamber I8 through the bore 28, passages 53, annular chamber 52, bore 55, inlet passage 58, valve chamber 51, outlet passage 68, tube bore 1|, bore 15, to the chamber 14, where the baffle 99 provides a whirling action to the water passing through the small bore 85. 'Ihe jet of water issuing from the small bore 85 into the enlarged bore 86 from whence it ows through the bore 94 through the discharge opening I9 of the cuspidor bowl 6, through the hollow arm 5, reduced neck 22, passage 23 and pipe 24 for disposal. The jet of water issuing from `the small bore 85 reduces the pressure in the annular chamber 89 which effects a suction in the tube 99. Due to the large volume of Water flowing through the high volume `water takeoff, the suction is suflicientithatwhen the dental surgery is `being performed and the ter- .,minal end 92 in the patients mouth, the large quantity of blood resulting from the surgery will be drawn through the terminal 92, tube 99,

, chamber 89, through the aperture 88 and discharged with the water through the enlarged bore 86, bore 94 to the drain of thecuspidor. The arrangement is such that there is no tendency for back pressure to be created sufficient to effect iow of water into the tube 99.

When the dental surgery is completed, `the valve 59 is closed, stopping flow of water to the blood ejector but permitting the normal use of the remainder of the apparatus carried on the pedestal If desired, the blood ejector mechanism can beremoved from the cuspidor bowl but it can be also left in place without interfering with the normal operations of the `pedestal apparatus. i i,

A modified form of master valve structure having a high volume water takeoff is shown in Fig. 6, this form of the invention being designated for use on pedestals wherein the bearing 4 has an externally threaded boss |99 provided with a bore |9| communicating with the valve chamber I8. In such structures a valvebody |92 is connected to the threaded boss |99 by means of a union nut |93. The bodjT |92 `has a chamber |94 communieating through a bore |95 with the bore |9| and the valve chamber I8. The valve 29 is carried on a stem |96 having athreaded portion |91 screwed into an internally threaded bore |98 in the valve body |92, said stem having an external operating member |99. The valve body is provided with suitable packing ||9 and a packing gland to prevent leakage around the valve stem. `The body |92 has a lateral extension ||2 which is suitably connected to the control valve 56, whereby the inlet passage 58 of said control valve communicates through an aperture I3 with the chamber |94.

The operation of the structure with this modified form of master valve is the same as was described in connection with the structure illustrated in Figs. 1, to 5, inclusive.

It is believed obvious that I have provided a blood ejector mechanism and high volume water takeoff therefor for a conventional dental pedestal for adapting same for use in dental surgery without altering the conventional operation o f the pedestal apparatus.

What I claim and desire tousecure by Letters Patent is:

1. In dental apparatus having a hollow pedestal with a cuspidor, saliva ejector and water supply and discharge connections, said cuspidor having a drain communicating with the discharge connections, said pedestal having a valve chamber and inlet and outlet passages therein communicating with said valve chamber,` said outlet passage having valved connection with the saliva ejector, a valve body mounted on the pedestal and having a bore coaxial with said inlet passage, a valve stem extending through the valve body and into the valve chamber, means 'on said stem for controlling flow of water from the inlet passage into the valve chamber, means in the valve body engaging the valve stem remotely of the pedestal for preventing leakage of water around said stem, a valve controlled ow line connected to the valve body and communieating with the bore therein for supplying a high Volume water takeoff therefrom, and a blood ejector operatively connected with the flow line.

2. In dental apparatus having a hollow pedestal with a cuspidor, saliva ejector and water supply and discharge connections, said cuspidor having a drain communicating with the discharge connections, said pedestal having a valve chamber and inlet and outlet passages therein communicating with said valve chamber, said outlet passage having valved connection with the saliva ejector, a valve body mounted on the pedestal and extending therefrom, said valve body having a bore coaxial with said inlet passage and communicating with the valve chamber, a valve stem extending through the valve body and into the valve chamber, a valve on said stem for controlling :dow of water from the inlet passage into the valve chamber, means in the valve body engaging the valve stem remotely of the pedestal for preventing leakage of water around said stem, a valve controlled flow line connected to the valve body and communicating with the bore therein for supplying a high volume water takeoff therefrom, a blood ejector opera-tively connected with the flow line, and a discharge pipe for said blood ejector discharging into the cuspidor drain.

3. In dental apparatus having a hollow pedestal with a cuspidor and water supply and discharge connections, said cuspidor having a drain communicating with the discharge connections, a valve body mounted on the pedestal and having a chamber communicating with the water supply, valve means in the valve body and extending into the pedestal for controlling the water supply, a blood ejector having a discharge nozzle therein, a discharge pipe secured to the ejector, an apertured end on the discharge pipe seated in the cuspidor drain for supporting the discharge pipe and ejector, said apertured end providing drainage from the cuspidor, means removably mounted on the cuspidor and engaging the ejector for supporting the upper end of same over the cuspidor, valve controlled means connected to the valve body and the blood ejector for flow of water from the chamber in the valve body to the ejector, and a fitting adapt-ed for insertion in a patients mouth and having communication with the ejector adjacent the nozzle therein whereby discharge of water from the nozzle will form a suction drawing blood and liquids from the patients mouth and discharge same into the cuspidor drain.

`ci.` Indental apparatus having a hollow pedestal with a cuspidor and water supplyand discharge connections, said cuspidor having a drain communicating with the discharge connections, a valve body mounted on the pedestal and having a chamber communicating with the water supply, valve means in the valve bodyl and extending into the pedestal for controlling the 7 water supply, a bloodv ejector-having-a discharge nozzle therein, a discharge pipe secured tothe ejector, anV apertured end on the discharge pipe seated on the cuspidoraroundthe` drain thereof for supporting the discharge-pipeandejectory and providing for drainagefrom the cuspidor, a

braclzetfsupported on the-cuspidor, a tubehaving one end fixed on the'bracket and the other end connected to the ejector for supporting the upper end of same, said tube communicating with the ejector for supplying water thereto, valve: controlled means connected tothe valve bodyand said one-end ofthe tube for flow ofwater from the chamber in the valve. body to the ejector, and a tting adapted for'insertion in ay patients mouth and having communication' with the ejector adjacent the nozzle therein w'herebyxdischarge of Water from thenozzle will form a suction drawing blood and liquids from the patients mouth and discharge same into the cuspidor drain.

5. In dental apparatus having a, hollow pedestal with a cuspidor, saliva ejector and Water supply and discharge connections, said cuspidor having a drain communicating with the discharge connections, said'pedestal having a, valve chamber and inlet and outlet passages therein con'nnunicatingwith said valve chamber, said outlet passage havingv valved connection with the saliva ejector, a valve body. mounted on pedestal and having a bore coaxial with said inlet passage, meansextending throughthe valve body and into the'valve chamberffor controlling flow of water from the inlet passage intol the valve chamber, a valve controlled now line connected to the valvebody andcommunicating withthe bore therein for supplying a high volume Water takeoi therefrom, a blood ejector having a discharge nozzle therein, means removably mounted on the cuspidor and engaging the blood ejector for supporting the upper end of 'same' overthe cuspidor, said valve controlled flow` line beingt connected With the blood ejector for ow ofwater from the valve body to the blood ejector, and a tting adapted for insertion in a patients Ymouth and having communication with the blood ejector adjacent the nozzle therein Wherebyldischarge of Water from the nozzle will form a suction drawing blood and liquids fromathe patients mouth and discharging same into the cuspidor drain.

6. In dental apparatus having a hollow-pedestal with a cuspidor, saliva ejector and water supply and discharge connections, sadcuspidor having a drain communicating with the discharge connections, said pedestal having avalve chamber and inlet and outlet passages therein communicating with said valve chamber, saidv outlet passage having valved connection with'the saliva ejector, a valve body mounted on the `pediestal and extending therefrom, said valve-body. having a bore coaxial with said inlet passage and communicating with the valve chamber, a valve stem extending through the-valve bodysand into the valve chamber, means on said stemfor controllingY flow of water from the inlet passage into the valve chamber, means in thevalve body engaging the valve stem remotely ofthe `pedestal for preventingleakage of Water around'said stem, a valvevcontrolled flow line connected to the valvebody and communicatingv Withthe boretherein for supplying a ,high volume ,water takeoff-there-v from, ar blood? ejector 'having ai discharge nozzle therein, a discharge'-pipe/forsaid'blood ejector discharging intoithe--cuspidor drain,- an apertured endonlthendischarge pipe seated in thel cuspidor drain for supporting: the discharge pipe and blood ejector, means vremovablymounted on the cuspidorfandr engaging the blood' ejector for suppertingtheupperfendioffsarne over the cuspidor, said' valve controlled flow, linebeing connected with the blood1ejector-for ilovv.` of water from the Valve body to the -b'loodejectonl and a tting adapted forf'insertion in a: patients mouth and having.:y communication with thebloodI ejector adjacentrthe nozzle therein wherebyi discharge off water# from;v the v nozzlel vvill form av suction draining.l blood and liquids'` from` the patients mouth' andv discharging same into Vthle'cuspidor drain.

7 Inf. dental? apparatus having a hollow, pedestalffwith a=cuspidor; salivaiejector andwater supplyr'and discharge.. connections, said cuspidor havmg a drainA communicating with. the dis;-A

chargeconnections, said. pedestal having avalve chamber and-f. inletfv and' outlet-.passages therein communicating with saidvalvechamber,- said outletpassage; having valved connection with the saliva ejector, a valveA body.` mountedfon the pedestal and.: extending therefrom, said valve body having a bore coaxial: with. said inlet pas'- sagef and.com1nunicating. with the valve chamber,l a: valve stemextending through the valve body` and'intothe-valveechambeig a. valve on said stem .for controllingflow of-Water from the inlet' passage intothe valver chamber, means in the valvefbodyfengaging the'valvefstem remotely of the pedestal for preventing leakage of water. around: saidz stem, a valve controlled now line connected to the valve body and communicating with.- the bore: therein for supplying av high volume-vvatertakeoff therefrom, a blood ejector. havingav dischargenozzletherein, a discharge pipe-,for saidfblood'i ejector discharging into -the cuspidor: drain, an.dependi-ngrflangedA end on the dischargeV pipe: with` the; edgeof the flange seated inl the cuspidorfdrain for supportingy the discharge pipe andbloodlejector; said depending; ange :havingr4 a plurality of.I apertures for drainage fromv the: cuspidor, a bracket: fixed-on the cuspidor, atube having. oneV end! supported on the: bracket andi-the` other end connected tothe blood ejectorl forl supporting: the upper end off same, said one one: of `the tube-being connected to-the valveicontrolledlfiow line and-th'eother: end communicatingv Withthev blood ejector for:

iiowoffwaterfromfthe. valve body, to the'blood.

ejector, andi altting adaptedf'for insertion ina patientfsmouth rand-having: communication with thebloody ejector:l adjacent'. thenozzle therein-r wherebyA discharge lof-.f Waterv from r.thenozzle willh form a suction draining blood and liquids from the` patientis. mouthA and'l discharging` same.` into the cuspidor drain.

ROBERT,V Si WY NE.:

References; Cited 5. in:` tliez.A le; of i. this 5 patent;

UNITED STATES PATENTS Number Name DateY 1,552,323 Lehman ,-Sept 1, 1925vv 1,719,306` Beiper,I July 2,1929 2,243,695 Connell May,27, 1941l 

